*HEADING
 :  CPE4 MODEL CHANGE VERIFICATION, UHYPER MATERIAL
*NODE
*NGEN,NSET=BOT
*NGEN,NSET=TOP
*NFILL,NSET=NALL
BOT,TOP,4,100
*NSET, NSET=XFIX, GEN
*NSET, NSET=YFIX
*NSET, NSET=YFIX2
*NSET, NSET=XMOVE, GEN
*NSET, NSET=YMOVE, GEN
*ELEMENT,TYPE=CPE4,ELSET=EALL
*ELGEN,ELSET=EALL
*ELSET, ELSET=EREMOV
*SOLID SECTION,MATERIAL=RUBBER,ELSET=EALL
1.,
*MATERIAL,NAME=RUBBER
*HYPERELASTIC,USER,TYPE=COMPRESSIBLE
*BOUNDARY
YFIX, 2, 2
XFIX, 1,1
YFIX2, 2,2
*STEP,NLGEOM
 COMPRESS ELEMENTS
*STATIC
0.1,1.,0.1,0.1
*BOUNDARY
XMOVE, 1,1 ,-0.1
*NODE PRINT,FREQ=999
U,
RF,
*EL PRINT,FREQ=999
E,
S,
*NODE FILE,FREQ=999
U,
RF,
*EL FILE,FREQ=999
E,
S,
*END STEP
*STEP,NLGEOM
 REMOVE MIDDLE ELEMENTS
*STATIC
1.,1.
*MODEL CHANGE,REMOVE,TYPE=ELEMENT
EREMOV,
*END STEP
*STEP,NLGEOM
 MOVE REMOVED NODES BACk IN
*STATIC
1.,1.
*BOUNDARY
YMOVE, 2,2, 0.0
*END STEP
*STEP,NLGEOM
 ADD ELEMENTS BACK IN ANNEALED
*STATIC
0.1,1.,0.1,0.1
*MODEL CHANGE,ADD,TYPE=ELEMENT
EREMOV,
*BOUNDARY,OP=NEW
YFIX, 2, 2
XFIX, 1,1
YFIX2, 2,2
XMOVE, 1,1 ,0.1
*END STEP